Wrong size after zpool expand

I expanded my raidz-2 pool from 4x4tb to 5x4tb. Zpool info reports as it should report new pool size but GUI is messed up, also SMB reports same as GUI.

Usable zpool should be 14.5TIB as zpool states, but GUI only shows 8,68TIB and only 2TIB free. How I can get gui to show real data?

I do not understand how this works. Some suggested the rebalancing script, others suggested to do nothing.

That’s a known bug, discribed at length here

TLDR: The data before expansion is written with a different parity ratio then the data after expansion which leads to the difference in shown size.

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